What are the effects of mechanical ball milling on oxygen ...- ball mills developed ,What are the effects of mechanical ball milling on oxygen layer developed on Aluminum powder ? my work includes mechanical milling of aluminum powder in …Mini-Mill PULVERISETTE 23 / Description - fritsch.deAvailable only from FRITSCH: In Special consideration of the ball mill grinding concept, we developed for the PULVERISETTE 23 a grinding bowl with interior walls that are spherical instead of cylindrical.